diff --git a/cores/esp32/esp32-hal-timer.c b/cores/esp32/esp32-hal-timer.c
index b260ac32be2..ec6c507358e 100644
--- a/cores/esp32/esp32-hal-timer.c
+++ b/cores/esp32/esp32-hal-timer.c
@@ -242,7 +242,7 @@ uint64_t timerReadMicros(hw_timer_t *timer) {
   return timer_val * 1000000 / frequency;
 }
 
-uint64_t timerReadMilis(hw_timer_t *timer) {
+uint64_t timerReadMillis(hw_timer_t *timer) {
   if (timer == NULL) {
     log_e("Timer handle is NULL");
     return 0;
diff --git a/cores/esp32/esp32-hal-timer.h b/cores/esp32/esp32-hal-timer.h
index 35518534783..59b88c99cba 100644
--- a/cores/esp32/esp32-hal-timer.h
+++ b/cores/esp32/esp32-hal-timer.h
@@ -42,7 +42,7 @@ void timerWrite(hw_timer_t *timer, uint64_t val);
 
 uint64_t timerRead(hw_timer_t *timer);
 uint64_t timerReadMicros(hw_timer_t *timer);
-uint64_t timerReadMilis(hw_timer_t *timer);
+uint64_t timerReadMillis(hw_timer_t *timer);
 double timerReadSeconds(hw_timer_t *timer);
 
 uint32_t timerGetFrequency(hw_timer_t *timer);
diff --git a/docs/en/api/timer.rst b/docs/en/api/timer.rst
index 58706d8e453..2637f9eec1d 100644
--- a/docs/en/api/timer.rst
+++ b/docs/en/api/timer.rst
@@ -119,14 +119,14 @@ This function is used to read counter value in microseconds of the timer.
 
 This function will return ``counter value`` of the timer in microseconds.
 
-timerReadMilis
-**************
+timerReadMillis
+***************
 
 This function is used to read counter value in milliseconds of the timer.
 
 .. code-block:: arduino
 
-    uint64_t timerReadMilis(hw_timer_t * timer);
+    uint64_t timerReadMillis(hw_timer_t * timer);
 
 * ``timer`` timer struct.